So for example if you want the "Menace Chain Gauntlets" which is the Warrior's glove, you can hunt anything from the Knight/Warrior list, like Female Condor. The parts you get are random, but those monsters are guaranteed to drop the recipes for the classes it is listed under. If you don't get the part you want, just continue hunting.

....or find someone nice to act as a crafter for you. My soulmaker Ethelbruda has all the menace artisan designs, and my ranger Lariah has all the blacksmith menace designs, and I'm sure I'm not the only one with characters like this. I don't think anyone would charge too much for crafting service (if you gather the materials). Personally I'd charge ya 1 rupee, but I've been a bit 'casual' in my playing hours of late.